How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 1/12100.0*Chance in playoffs100.0*Average seed
Bristol 22 Bath 57 +17.0
+1.2
Harlequins 18 Edinburgh 23 -3.8
-0.1
Treviso 0 Gloucester 41 -1.5
-0.0
Grenoble 31 Newcastle 27 +1.5
+0.1
Pau 21 Cardiff 22 -1.2
-0.1
Brive 17 Worcester 14 -0.1
Bayonne 14 La Rochelle 24 -0.1
If winner is:HomeDrawAway
Ospreys vs Lyon+0.1*-0.1-0.5
-0.0-0.0+0.1
Saracens vs Stade Français+0.2+0.2-0.0
If winner is:HomeDrawAway
Week of 1/19100.0*Chance in playoffs100.0*Average seed
Bath vs PauIn-31.9-49.6
+0.2-4.4-5.4
Cardiff vs Bristol-0.3*+0.0In
-0.0+0.0+0.1
Edinburgh vs Saracens-0.0+0.3+0.5
+0.0-0.2-0.2
Lyon vs Grenoble-0.1+0.3+0.4
La Rochelle vs Treviso-0.0*-0.1+0.3
Stade Français vs Harlequins-0.1*-0.0+0.1
Newcastle vs Ospreys-0.1*-0.1+0.0
+0.1+0.1-0.0
Worcester vs Enisey+0.0+0.1*-0.0
Gloucester vs Bayonne-0.0+0.0+0.1
Brive vs Dragons+0.0+0.1-0.1

* A starred number could be exactly 0 or just really small. The simulation did not run long enough to know.

What If

Chances based on how well the Bath finish out the regular season.   Explain

100100100100100100100100100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-D-Lplayoffs1234567891011121314151617181920Count
201-0-0In3224427418,338,838
180-1-066.6%00871054628500133,264
160-0-148.9005640331251143222101472,058
Total:98.5%32143274001100000000018,944,160
Games Above .500
Chance Will Make Playoffs